/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkSGText_DEFINED
#define SkSGText_DEFINED

#include "modules/sksg/include/SkSGGeometryNode.h"

#include "include/core/SkFont.h"
#include "include/core/SkPoint.h"
#include "include/core/SkString.h"
#include "include/core/SkTextBlob.h"
#include "include/utils/SkTextUtils.h"

class SkCanvas;
class SkPaint;
class SkTypeface;

namespace sksg {
/* *
 * Concrete Geometry node, wrapping a (shaped) SkTextBlob.
 */
class Text final : public GeometryNode {
public:
    static sk_sp<Text> Make(sk_sp<SkTypeface> tf, const SkString &text);
    ~Text() override;

    SG_ATTRIBUTE(Typeface, sk_sp<SkTypeface>, fTypeface)
    SG_ATTRIBUTE(Text, SkString, fText)
    SG_ATTRIBUTE(Position, SkPoint, fPosition)
    SG_ATTRIBUTE(Size, SkScalar, fSize)
    SG_ATTRIBUTE(ScaleX, SkScalar, fScaleX)
    SG_ATTRIBUTE(SkewX, SkScalar, fSkewX)
    SG_ATTRIBUTE(Align, SkTextUtils::Align, fAlign)
    SG_ATTRIBUTE(Edging, SkFont::Edging, fEdging)
    SG_ATTRIBUTE(Hinting, SkFontHinting, fHinting)

    // TODO: add shaping functionality.

protected:
    void onClip(SkCanvas *, bool antiAlias) const override;
    void onDraw(SkCanvas *, const SkPaint &) const override;
    bool onContains(const SkPoint &) const override;

    SkRect onRevalidate(InvalidationController *, const SkMatrix &) override;
    SkPath onAsPath() const override;

private:
    Text(sk_sp<SkTypeface>, const SkString &);

    SkPoint alignedPosition(SkScalar advance) const;

    sk_sp<SkTypeface> fTypeface;
    SkString fText;
    SkPoint fPosition = SkPoint::Make(0, 0);
    SkScalar fSize = 12;
    SkScalar fScaleX = 1;
    SkScalar fSkewX = 0;
    SkTextUtils::Align fAlign = SkTextUtils::kLeft_Align;
    SkFont::Edging fEdging = SkFont::Edging::kAntiAlias;
    SkFontHinting fHinting = SkFontHinting::kNormal;

    sk_sp<SkTextBlob> fBlob; // cached text blob

    using INHERITED = GeometryNode;
};
} // namespace sksg

#endif // SkSGText_DEFINED
